Improvement in knobs or closet-pins



C. H. THURSTON. "K nhfnr Cfloset Pins.

No.l'54,4297. K PatentedAug.25,1874.

Fay. 7,

, f @www@Siggi Mgg THE GRAPHIC C0* FHOTU'LITHJS url PARK PLACE,N.Y.

NITED STATES PATENT OFFICE.

CHARLES H. THUItSTON, OF MARLBOROUGH, NEW HAMPSHIRE.

IMPROVEMENT IN KNOBS OR CLOSET-PINS.

- Specification forming part of Letters Patent No. 154,429, dated August 25, 1874; applica-tion led June 10, 1874.

hereby declare the same to be fully described in the following specication, and represented in the accompanying drawings, of which- Figure 1 is a side view, Fig. 2 a rear end' elevation, and Fig. 3 a longitudinal section, of a knob or closet-pin, provided with my improvement.

The invention specially relates to ay closetpin or knob constructed substantially as described and represented inLetters Patent No.

7 7,550, granted May 5, 1868, to the undersigned,

and since reissued, the reissue being numbered 5,633, such a knob'being composed of a head or body of wood, or like material, a grooved `double-pointed metallic screw, and a key or wedge driven into the head, and also into the groove of the screw. Y

In order to strengthen the head or body of the knob, and prevent it from splitting or being split during insertion of the screw into it, or by lateral pressure exerted on it and the screw, by a garment or article when hung upon the head, While the knob, by its screw, may be xed in a wall, cleat, article of furniture, or other object, I combine with said body, screw, and wedge, a metallic strengthener reenforcc, substantially as hereinafter described, which, previous to insertion of the screw and wedge or key into the head, is to be driven or introduced endwise into the head concentrically with the part thereof destined to receive the screw. This tube I usually provide with a disk or ilange extended from it.

In the drawings the groved screw of the knob or closet pin is shown at A, the head or body at B, and the key at C, while the metallic re-enforce or strengthener is represented at D, and the disk or ilange at E. The tube projects fromthe plate at right angles, and opens Vthrough it-that is, the base-plate is open to enable the screw and wedge to be readily inserted in the wood or pin B, after the reenforce may have been driven therein. The base E, as shown, has a diameter greater than that of the contiguous end of the knob or pin B. By so making the base we obtain a greater support of the pin against a wall or article when fixed thereto. It is important that the re-enforce be open in front, or open through the plate or base, otherwise the screw and wedge could not be inserted in the wood or encompassed bythe re-enforce. Such reenforce prevents any expansion of the wood outside of it 'by the screw or wedge, during insertion of either into it, and also thewood encompassed by it from being split radially by the screw or wedge while either may be in the act of being driven therein. It also causes the wood to take a firmer hold of the screw and the wedge than it otherwise would, and efectually obviates danger of splitting the knob-head at the screw or separation of the two, as above stated.,` The screw has gimletpoints at its opposite ends, and a groove arranged with and in it longitudinally across its threads, such groove being for reception of the key, which acts to prevent .the screw from being unscrewed from the head while the lat` ter is in the act of being used to revolve the the screw for attaching the knob or closet-pin to an object.

When the knob is screwed into an article the re-enforce becomes completely hidden from view, the ange only being seen when extended to or beyond the circumference ofthe base of the knob.

The knob at its base abuts directly against the ilange, whichnot only greatlystrengthens the re-enforce, but is highly useful in other respects, as will be readily seen. It is also ornamental.

I claim- The combination of the re-enforce D and the perforated base or plate E, the head B, screw A, and key C, all substantially as explained and represented.

CHAS. H. THURSTON.

Witnesses:

R. H. EDDY, J oHN BIRKENHEAD. 

